Siemens AVS75.39 Series User Manual page 160

160 / 239
Siemens
Building Technologies
St tank transfer pump Q11
If the temperature level of the buffer storage tank is high enough, the DHW storage
tank can be charged by the buffer storage tank.
Depending on the hydraulic circuit, the transfer of heat can be effected either with
charging pump Q3 or transfer pump Q11, which is specifically parameterized for
this function.
Parameterization for transfer strategy (5130), comparative temperature (5131) and
transfer boost (5021) apply for both plant configurations.
The charging pump Q3 is only used for source boost if transfer pump Q11 is
available.
The transfer with Q11 is independent of the function "With buffer storage"
(line 5090).
The transfer function is also active if a combination storage tank and one transfer
pump Q11 available.
DHW mixing pump Q35
Separate pump for storage tank circulation during the time the "Legionella" function
is active.
DHW interm circ pump Q33
Charging pump with DHW storage tank using an external heat exchanger.
Heat request K27
Release relay K27 is used together with control relay K32 for the flow control of the
supplementary source (see line 3690-3755).
The supplementary source is released to control via the release relay when a heat
request is pending and the required hydraulic switching actions (e.g. diverting
valves, etc.) are triggered.
Refrigeration request K28
Output K28 is enabled as soon as there is a refrigeration request.
In the case of the device with address 1, a request for refrigeration from the system
can also activate output K28. For this purpose, operating line 6627 "Refrig demand
K28" on menu "LPB system" must be set to "Centrally".
Air dehumidifier K29
When room humidity rises, an external dehumidifier can be switched on. In this
case, a humidity sensor must be connected to the H... input.
The functionality of the air dehumidifier is independent of the functionality of
cooling mode.
Operation of the dehumidifier is not affected by operating modes, holiday
programs, presence button, etc.
Diverting valve cooling Y21
Control of the diverting valve for cooling. This necessitates a 4-pipe system. The
diverting valve for cooling is required in the case of a commonly used heating and
cooling circuit for changeover from heating to cooling when the heat pump is used
not only for heating but also and simultaneously for cooling.
User manual RVS43.345
The settings in detail
CE1U2354en_021
2013-09-02